package com.wsx.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.wsx.common.R;
import com.wsx.dto.DishDto;
import com.wsx.entity.Category;
import com.wsx.entity.Dish;
import com.wsx.entity.DishFlavor;
import com.wsx.entity.SetmealDish;
import com.wsx.service.CategoryService;
import com.wsx.service.DishFlavorService;
import com.wsx.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);
        //清理所有菜品的缓存数据
        /*Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        redisTemplate.delete(keys); //删除这些key*/
        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //第一次对象拷贝，不需要拷贝records属性的值
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> collect = records.stream()
                .map(new Function<Dish, DishDto>() {
                    @Override
                    public DishDto apply(Dish dish) {
                        DishDto dishDto = new DishDto();
                        //第二次对象拷贝，把遍历的每个Dish属性赋值给DishDto属性
                        BeanUtils.copyProperties(dish, dishDto);
                        Long categoryId = dish.getCategoryId();
                        //根据id查询分类对象
                        Category category = categoryService.getById(categoryId);
                        if (category != null) {
                            String categoryName = category.getName();
                            dishDto.setCategoryName(categoryName);
                        }
                        return dishDto;
                    }
                }).collect(Collectors.toList());
        dishDtoPage.setRecords(collect);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        log.info("菜品id,{}",id);

        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);
        /*//清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        redisTemplate.delete(keys); //删除这些key*/

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("修改菜品成功");
    }

    /**
     * 停售菜品
     */
    @PostMapping("/status/{status}")
    public R<String> sale(@PathVariable int status, String[] ids){
        for(String id: ids){
            Dish dish = dishService.getById(id);
            dish.setStatus(status);
            dishService.updateById(dish);
        }
        return R.success("修改成功");
    }

    /**
        删除菜品
     */
    @DeleteMapping
    public R<String> delete(String[] ids){
        for (String id:ids) {
            LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
            Dish dish = dishService.getById(id);
            Long id1 = dish.getId();
            queryWrapper.eq(DishFlavor::getDishId,id1);

            dishFlavorService.remove(queryWrapper);
            dishService.removeById(id);
        }

        return R.success("删除成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     *      Dish实体类主要就是封装页面传过来的categoryId和status
     */
    @GetMapping("/list")
    public R<List<DishDto>> dishList(Dish dish){
        log.info("dish菜品分类的列表数据,{}",dish);

        List<DishDto> dishDtoList = null;
        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844391040167938_1
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream()
                .map(new Function<Dish, DishDto>() {
                    @Override
                    public DishDto apply(Dish dish) {
                        DishDto dishDto = new DishDto();
                        BeanUtils.copyProperties(dish, dishDto);
                        //分类id
                        Long categoryId = dish.getCategoryId();
                        //根据id查询分类对象
                        Category category = categoryService.getById(categoryId);
                        if (category != null) {
                            String categoryName = category.getName();
                            dishDto.setCategoryName(categoryName);
                        }
                        //当前菜品的id
                        Long dishId = dish.getId();
                        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
                        lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
                        //SQL:select * from dish_flavor where dish_id = ?
                        List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
                        dishDto.setFlavors(dishFlavorList);
                        return dishDto;
                    }
                }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }




}
